Simple calculation: (5/6)*(21/5)*16.
简便计算：(5/6)*(21/5)*16．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">21 / 5</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">(5/6) * (21/5) * 16</gadget>
<output>56</output>

<result>56</result>