(20+9.774/2.4)*0.5-1.427.
(20+9.774/2.4)*0.5-1.427．
<gadget id="calculator">9.774 / 2.4</gadget>
<output>4.0725</output>

<gadget id="calculator">20 + 4.0725</gadget>
<output>24.0725</output>

<gadget id="calculator">24.0725 * 0.5</gadget>
<output>12.03625</output>

<gadget id="calculator">12.03625 - 1.427</gadget>
<output>10.60925</output>

<result>10.60925</result>