Use the formula (207-120)/3 to make up a short story and calculate.
利用算式(207-120)/3编一个小故事，并计算．
<gadget id="calculator">207 - 120</gadget>
<output>87</output>

<gadget id="calculator">87 / 3</gadget>
<output>29</output>

<result>29</result>