Xiaoyong is too fat, and after doing physical exercise, his weight is reduced (1/10) compared with the original weight; Xiaolin is too thin, and his weight has increased (1/10) after physical exercise, and now the weight of the two is exactly the same. It turns out that Xiaoyong weighs more than Xiaolin.
小勇太胖，通过体育锻炼后，体重比原来减轻了(1/10)；小林太瘦，通过体育锻炼体重比原来增加了(1/10)，现在两人的体重刚好相等．原来小勇比小林重多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(11/10) / (9/10)</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">(11/9) - 1</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>