Simple calculation: (6.9*0.21*0.57)/(0.14*0.19*2.3).
简算：(6.9*0.21*0.57)/(0.14*0.19*2.3)．
<gadget id="calculator">6.9 * 0.21 * 0.57</gadget>
<output>0.82593</output>

<gadget id="calculator">0.14 * 0.19 * 2.3</gadget>
<output>0.06118</output>

<gadget id="calculator">0.82593 / 0.06118</gadget>
<output>13.5</output>

<result>13.5</result>