An index number is simply referred to a number that is being raised to a particular power or index which tells us the amount of times the number will be multiplied by itself. An example is 10³ which means we have to multiply 10 thrice and this will be:
= 10 × 10 × 10
= 1000
For 866,214,000,000, this can be expressed as:
= 8.66214 × 10^11
We should note that 8.66214 can be changed to the nearest whole number which will be approximated to 9.
