Calculate with a simple method: (1-((7/12)+(7/18)))/(5/36).
用简便方法计算：(1-((7/12)+(7/18)))/(5/36)．
<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">(7/12) + (7/18)</gadget>
<output>35/36 = around 0.972222</output>

<gadget id="calculator">1 - (35/36)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">5 / 36</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">(1/36) / (5/36)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>