The number A is divided by the number B, the quotient is (2/5). The sum of these two numbers is 140, what is the difference.
甲数除以乙数，商是(2/5)．它们两数的和是140，差是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1 + (5/2)</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">140 / (7/2)</gadget>
<output>40</output>

<gadget id="calculator">140 - 40</gadget>
<output>100</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<result>60</result>