Grandpa's age this year is five times that of Xiaoqiang's, just 52 years older than Xiaoqiang's. What is Xiaoqiang's age this year?
爷爷今年的年龄是小强的5倍，刚好比小强大52岁，小强今年的年龄是多少岁．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">52 / 4</gadget>
<output>13</output>

<result>13</result>