18.7-(8.7+5.3) is equal to the calculation result of which of the following formulas? How many
18.7-(8.7+5.3)与下面哪道算式的计算结果相等？多少
<gadget id="calculator">8.7 + 5.3</gadget>
<output>14</output>

<gadget id="calculator">18.7 - 14</gadget>
<output>4.7</output>

<result>4.7</result>