What should I do with Python multiplication?

Question

Python

What to do, if:

a = 100
b = 0.00000028
c = a*b
print(c)

Outputs 2.8000000000000003e-05
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How to make it output 0.000028

Answer 1

round(c, 6)

Answer 2

Alternative option:

from decimal import Decimal

a = Decimal('100')
b = Decimal('0.00000028')
c = a * b
print(c)

# 0.00002800