Dad said to Xiaoxiao: "You are 13 years old this year." Xiaoxiao said to Dad: "My age is one year older than yours (1/3)." How old is Dad this year? (column equation solution)
爸爸对笑笑说："你今年13岁．"笑笑对爸爸说："我的年龄比你的(1/3)多1岁．"爸爸今年多少岁？(列方程解答)
<gadget id="calculator">13 - 1</gadget>
<output>12</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 / (1/3)</gadget>
<output>36</output>

<result>36</result>