Calculation: 221*60/13+221*60/17=how much.
计算：221*60/13+221*60/17=多少．
<gadget id="calculator">60 / 13</gadget>
<output>60/13 = around 4.615385</output>

<gadget id="calculator">221 * (60/13)</gadget>
<output>1_020</output>

<gadget id="calculator">60 / 17</gadget>
<output>60/17 = around 3.529412</output>

<gadget id="calculator">221 * (60/17)</gadget>
<output>780</output>

<gadget id="calculator">1_020 + 780</gadget>
<output>1_800</output>

<result>1_800</result>