There is a kid in grade 4 who originally had a piggy bank of 11.42 yuan. Yesterday he bought a pen with 7.5 yuan. If his mother gave him another 0.35 yuan today, how much money is in his piggy bank now?
有一个4年级的孩子存钱罐原来有11.42元，昨天他用7.5元买了一支钢笔，如果他妈妈今天又给他0.35元，现在他的存钱罐里有多少钱？
<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>