Calculation: 50+51+52+...+98+99+100=how much.
计算：50+51+52+…+98+99+100=多少．
<gadget id="calculator">50 + 100</gadget>
<output>150</output>

<gadget id="calculator">100 - 50</gadget>
<output>50</output>

<gadget id="calculator">50 + 1</gadget>
<output>51</output>

<gadget id="calculator">51 / 2</gadget>
<output>51/2 = around 25.5</output>

<gadget id="calculator">150 * (51/2)</gadget>
<output>3_825</output>

<result>3_825</result>