84*0.25+(1/4)*16.
84*0.25+(1/4)*16．
<gadget id="calculator">84 * 0.25</gadget>
<output>21</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 16</gadget>
<output>4</output>

<gadget id="calculator">21 + 4</gadget>
<output>25</output>

<result>25</result>