How to calculate 3xx7 by using logarithm? This is a story about Newton I read once when I was a child. Now that book is lost and I can only tell you what I remember.When Newton was young, he had been already famous in curiosity and smart. His family hired a helper. One day, she asked him to go to the market with her because she wasn't good at math. At the market, there was a problem that needed to calculate 3xx7. So the helper asked Newton. After a quick thinking using logarithm, he got the result that 3xx7 must larger than 20 and smaller than 22... So, my question is how did he do that calculate? How to use logarithm to get the result 20<3xx7<22? Thank you so much. The story countinues: ... and about to say the result. Before he could finish his math, a near by person had been listened to

$\frac{20b}{{\left(4b^3\right)}^3}$

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${\displaystyle 60\cdot 60\cdot 24\cdot 7\cdot 365}$
${\displaystyle 1000\cdot 60\cdot 60\cdot 24\cdot 365}$
${\displaystyle 24\cdot 60\cdot 100\cdot 7\cdot 52}$
${\displaystyle 1000\cdot 60\cdot 24\cdot 7\cdot 52?}$

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A)$1.496\times <!--\; \times \; -->{10}^{11}$
B)$1.496\times <!--\; \times \; -->{10}^{10}$
C)$1.496\times <!--\; \times \; -->{10}^{12}$
D)$1.496\times <!--\; \times \; -->{10}^8$

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