(7/18)*(1/4)+(3/4)*(7/18).
(7/18)*(1/4)+(3/4)*(7/18)．
<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/18) * (1/4)</gadget>
<output>7/72 = around 0.097222</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * (7/18)</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">(7/72) + (7/24)</gadget>
<output>7/18 = around 0.388889</output>

<result>7/18 = around 0.388889</result>