Last year, the age of the father was three times that of the son. The father is 46 years old this year. How old is the son this year?
去年爸爸的年龄是儿子的3倍，爸爸今年46岁，儿子今年有多少岁
<gadget id="calculator">46 - 1</gadget>
<output>45</output>

<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>