Step 1
Firstly we calculate the first part.
Multiply both the numbers
After that round off the result at tenth place.
\(\displaystyle{12.432}\times{3}={37.296}\)

\(\displaystyle{37.396}\approx{37.4}\) Step 2 Significant figures are those that have some meaning in overall value of the number. To determine what numbers are significant and which aren't, use the following rules: 1) Zero to the left of the decimal value less than 1 is not significant. 2) All trailing zeros are not significant. 3) Zeros between non zero numbers are significant. 4) All non zero numbers are significant. 5) If a number has more numbers than the desired numbers of significant digits, the number is rounded. For example, 532.500 is 533.000 to 3 significant digits. Step 3 So, here result is: Here 1 significant figure. Decimals: 0 \(\displaystyle{12.432}\times{3}\)

\(\displaystyle={37.296}\)

\(\displaystyle={40}\) Step 4 Now come to the next part. So, total 3 significant figures. Decimals: 0 \(\displaystyle{208}\times{62.1}={12916.8}\)

\(\displaystyle{12916.8}\approx{12900}\)

\(\displaystyle{37.396}\approx{37.4}\) Step 2 Significant figures are those that have some meaning in overall value of the number. To determine what numbers are significant and which aren't, use the following rules: 1) Zero to the left of the decimal value less than 1 is not significant. 2) All trailing zeros are not significant. 3) Zeros between non zero numbers are significant. 4) All non zero numbers are significant. 5) If a number has more numbers than the desired numbers of significant digits, the number is rounded. For example, 532.500 is 533.000 to 3 significant digits. Step 3 So, here result is: Here 1 significant figure. Decimals: 0 \(\displaystyle{12.432}\times{3}\)

\(\displaystyle={37.296}\)

\(\displaystyle={40}\) Step 4 Now come to the next part. So, total 3 significant figures. Decimals: 0 \(\displaystyle{208}\times{62.1}={12916.8}\)

\(\displaystyle{12916.8}\approx{12900}\)