75+76+77+78+...+97+98+99=how much.
75+76+77+78+…+97+98+99=多少．
<gadget id="calculator">75 + 99</gadget>
<output>174</output>

<gadget id="calculator">99 - 75</gadget>
<output>24</output>

<gadget id="calculator">24 + 1</gadget>
<output>25</output>

<gadget id="calculator">25 / 2</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">174 * (25/2)</gadget>
<output>2_175</output>

<result>2_175</result>