The same number is subtracted from the numerator and denominator of the fraction (85/157), and the new fraction is (2/5) after division. Then, what is the subtracted number?
分数(85/157)的分子和分母都减去同一个数，新的分数约分后是(2/5)，那么，减去的数是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 157</gadget>
<output>314/5 = around 62.8</output>

<gadget id="calculator">85 - (314/5)</gadget>
<output>111/5 = around 22.2</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(111/5) / (3/5)</gadget>
<output>37</output>

<result>37</result>