Calculate how much 56.8*35.7+56.8*28.5+64.2*43.2=.
计算56.8*35.7+56.8*28.5+64.2*43.2=多少．
<gadget id="calculator">56.8 * 35.7</gadget>
<output>2_027.76</output>

<gadget id="calculator">56.8 * 28.5</gadget>
<output>1_618.8</output>

<gadget id="calculator">64.2 * 43.2</gadget>
<output>2_773.44</output>

<gadget id="calculator">2_027.76 + 1_618.8 + 2_773.44</gadget>
<output>6_420</output>

<result>6_420</result>