triangle and a parallelogram have the same base and height, if the difference between their areas is 24, what is the sum of their areas?
一个三角形与一个平行四边形等底等高，如果它们面积之差是24，那么它们面积之和是多少．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">24 / 1</gadget>
<output>24</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<result>72</result>