It turned out to be 11.42 yuan. Yesterday I bought a pen for 7.5 yuan, and today my mother gave me another 0.35 yuan. How much money is in the piggy bank now?
原来有11.42元，昨天我用7.5元买了一枝钢笔，今天妈妈又给我0.35元．现在储蓄罐里有多少钱？
<gadget id="calculator">11.42 - 7.5</gadget>
<output>3.92</output>

<gadget id="calculator">3.92 + 0.35</gadget>
<output>4.27</output>

<result>4.27</result>