6.62*45+33.8*4.5.
6.62*45+33.8*4.5．
<gadget id="calculator">6.62 * 45</gadget>
<output>297.9</output>

<gadget id="calculator">33.8 * 4.5</gadget>
<output>152.1</output>

<gadget id="calculator">297.9 + 152.1</gadget>
<output>450</output>

<result>450</result>