A piece of cloth, the cloth is used to make clothes (1/4), and the cloth is used to make sheets (1/3), how much of this cloth is used in total.
一块布，做衣服用去这块布的(1/4)，做床单用去这块布的(1/3)，一共用去这块布的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/4) + (1/3)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>