The length of a rectangle is 10cm, and the width is 7cm. If its length and width are increased by 3cm, how much will its area increase in cm**2.
一个长方形的长是10cm，宽是7cm如果将它的长和宽都增加3cm，那么它的面积将增加多少cm**2．
<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<gadget id="calculator">7 + 3</gadget>
<output>10</output>

<gadget id="calculator">13 * 10</gadget>
<output>130</output>

<gadget id="calculator">10 * 7</gadget>
<output>70</output>

<gadget id="calculator">130 - 70</gadget>
<output>60</output>

<result>60</result>