Zhang Xiaoqing has 125 stamps, which is the number of Li Ming's stamps (5/7). How many stamps are there between them?
张小青有125张邮票，是李明邮票张数的(5/7)，他们两人的邮票相差多少张？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">125 / (5/7)</gadget>
<output>175</output>

<gadget id="calculator">175 - 125</gadget>
<output>50</output>

<result>50</result>