The cost price of a piece of clothing is 120 yuan. If it is sold at 180 yuan, what is its profit rate?
一件衣服成本价为120元，如果以180元出售，那么它的盈利率是多少．
<gadget id="calculator">180 - 120</gadget>
<output>60</output>

<gadget id="calculator">60 / 120</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/2) * 1</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>