Miaomiao is 12 years old this year, 3 years older than her father's age (1/4). How old is her father this year? (column equation)
妙妙今年12岁，比爸爸年龄的(1/4)多3岁，爸爸今年多少岁？(列方程)
<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">9 / (1/4)</gadget>
<output>36</output>

<result>36</result>