Xiao Ming bought a notebook with 5 yuan, and there is 50 yuan left, then the money used is the amount of Xiao Ming's original money
小明用5元钱买了一本笔记本，还剩50元钱，则用掉的钱为小明原有的钱的多少
<gadget id="calculator">5 + 50</gadget>
<output>55</output>

<gadget id="calculator">5 / 55</gadget>
<output>1/11 = around 0.090909</output>

<result>1/11 = around 0.090909</result>