The cost price of a pair of leather shoes is 50 yuan. If it is sold at a profit rate of 20%, how much is the selling price?
一双皮鞋的成本价为50元，如果以20%的盈利率出售，那么售价是多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">50 * (6/5)</gadget>
<output>60</output>

<result>60</result>