Zhao Benshan is Xiaoshenyang's master. He was 52 years old last year, which is 6/7 years older than Xiaoshenyang last year. How old was Xiaoshenyang last year?
赵本山是小沈阳的师傅，他去年52岁，比小沈阳去年的年龄多(6/7)，小沈阳去年多少岁？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">1 + (6/7)</gadget>
<output>13/7 = around 1.857143</output>

<gadget id="calculator">52 / (13/7)</gadget>
<output>28</output>

<result>28</result>