Find the product :

2.35 x 7.2

First we multiply 235 by 72

$\begin{matrix} & & 2 & 3 & 5 \ \times & & & 7 & 2 \ \hline & & 4 & 7 & 0 \ 1 & 6 & 4 & 5 & \times \ \hline \bold{1} & \bold{6} & \bold{9} & \bold{2} & \bold{0} \end{matrix}$

Clearly, 235 × 72 = 16920

Sum of decimal places in given decimals = (2 + 1) = 3

So, the product contains 3 places of decimal

∴ 2.35 × 7.2 = 16.920 = 16.92