Divide a watermelon into 10 pieces on average, mother ate 2 pieces, father ate 3 pieces, Xiaoling ate as much as mother, how much of the watermelon did they eat?
把一个西瓜平均分成10块，妈妈吃了2块，爸爸吃了3块，小玲吃得和妈妈一样多，他们一共吃了这个西瓜的几分之几？
<gadget id="calculator">2 + 3 + 2</gadget>
<output>7</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>