Xiao Ming has 10 yuan. He wants to buy a story book of 5.46 yuan and a pen of 7.54 yuan, how much is the difference?
小明有10元钱．他想买一本5.46元的故事书和一支7.54元的钢笔，还差多少元？
<gadget id="calculator">5.46 + 7.54</gadget>
<output>13</output>

<gadget id="calculator">13 - 10</gadget>
<output>3</output>

<result>3</result>