Divide:
$$ 217.44 \quad by \quad 18 $$
Perform the division by considering the dividend a whole number.
When the division of whole-part of the dividend is complete, put the decimal point in the quotient and proceed with the division as in case of whole numbers.
we have,
$$ 217.44 \div 18 $$
$$ \therefore 217.44 \div 18 = 12.08 $$