Rewrite \( 3.94 \div 0.2 \) as \( \frac{3.94}{0.2} \).
Step 2: Eliminate the decimal in the divisor
Multiply both the numerator and the denominator by 10 to eliminate the decimal in the divisor:
\[
\frac{3.94 \times 10}{0.2 \times 10} = \frac{39.4}{2}.
\]