Solve (9*10^-21)*(7.7*10^5)=

$$( 9 \times 10 ^ { - 21 } ) \times ( 7.7 \times 10 ^ { 5 } ) =$$

Evaluate

$$0.00000000000000693$$

Solution Steps

To multiply powers of the same base, add their exponents. Add -21 and 5 to get -16.

$$9\times 10^{-16}\times 7.7$$

Calculate 10 to the power of -16 and get \frac{1}{10000000000000000}.

$$9\times \frac{1}{10000000000000000}\times 7.7$$

Multiply 9 and \frac{1}{10000000000000000} to get \frac{9}{10000000000000000}.

$$\frac{9}{10000000000000000}\times 7.7$$

Multiply \frac{9}{10000000000000000} and 7.7 to get \frac{693}{100000000000000000}.

$$\frac{693}{100000000000000000}$$

Factor

$$\frac{7 \cdot 11 \cdot 3 ^ {2}}{2 ^ {17} \cdot 5 ^ {17}} = 6.93 \times 10^{-15}$$