you write quadrillion like......,,,,,,,,1,000,000,000,000
* * * * *
I hope you don't, because that is a trillion. A quadrillion has 3 more 0s, making 15 in all.
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It is too long to write in standard form and more susceptible to typing errors.
4,000,000,302,000,065 Which in standard form is 4.000000302000065 * 10 ^ 15
Expressed in word form, the number 10,000,000,000,000,000 is equal to ten quadrillion.
That IS the standard form.
You write 20.7 in standard form as: 2.07 × 101