We want to round the given decimal number and write the result as the product of a single digit and a power of 10.
231 210
Let's start by rounding the given number to the nearest 100 000. Since the digit in the ten-thousands place is less than 5, we will not modify the digit in the ${\color{#A800DD}{\text{hundred-}}} {\color{#A800DD}{\text{thousands}}} {\color{#A800DD}{\text{place}}}.'"`UNIQ--MLMath-4-QINU`"'
Finally, we will write the above number as the product of a single digit and a power of10.To do so, let's first factor out2.$
