Find the product :

0.04 x 0.36

First we multiply 4 by 36

$\begin{matrix} & & 3 & 6 \ \times & & & 4 \ \hline & \bold{1} & \bold{4} & \bold{4} \end{matrix}$

Clearly, 4 × 36 = 144

Sum of decimal places in given decimals = (2 + 2) = 4

So, the product contains 4 places of decimal

∴ 0.04 × 0.36 = 0.0144