What is the product of 78.12 and 1.5?

We have,

$78.12\times 1.5$

$=\frac{7812}{100}\times \frac{15}{10}$

$=\frac{7812\times 15}{1000}$

$=\frac{117180}{1000}$

On dividing a number by 1000, the decimal point is shifted to the left by three places.

Therefore,

$78.12\times 1.5=\frac{117180}{1000}=\mathbf{117}\mathbf{.}\mathbf{18}$