Question

don't laugh but i really need it!
how did this answer come?
need the steps√

Answer 1

$\frac{1}{1.6 \times{ 10}^{ - 19} } \\ \\ \frac{10}{16 \times {10}^{ - 19} } \\ \\ \frac{100}{16 \times {10}^{ - 18} } \\ \\ \frac{100 \times {10}^{18} }{16} \\ \\ 6.25 \times {10}^{18} \\ \\ \\ i \: hope \: ths \: help \: you$
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