Find the product :

0.2 x 0.2 x 0.02

First we multiply 2 by 2 and then by 2

$\begin{matrix} & 2 \ \times & 2 \ \hline & \bold{4} \end{matrix}$

∴ 2 × 2 = 4

$\begin{matrix} & 4 \ \times & 2 \ \hline & \bold{8} \end{matrix}$

∴ 2 × 2 x 2 = 8

Sum of decimal places in given decimals = (1 + 1 + 2) = 4

So, the product contains 4 places of decimal

∴ 0.2 × 0.2 × 0.02 = 0.0008