138.7+361.4+462.9-261.6=how much.
138.7+361.4+462.9-261.6=多少．
<gadget id="calculator">462.9 - 261.6</gadget>
<output>201.3</output>

<gadget id="calculator">138.7 + 361.4 + 201.3</gadget>
<output>701.4</output>

<result>701.4</result>