(1/40)*(999*28*40)*(1/28).
(1/40)*(999*28*40)*(1/28)．
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">999 * 28 * 40</gadget>
<output>1_118_880</output>

<gadget id="calculator">1 / 28</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">(1/40) * 1_118_880 * (1/28)</gadget>
<output>999</output>

<result>999</result>