Calculate how much 5+10+15+20+...+90+95+100=.
计算5+10+15+20+…+90+95+100=多少．
<gadget id="calculator">100 * 9</gadget>
<output>900</output>

<gadget id="calculator">900 + 150</gadget>
<output>1_050</output>

<result>1_050</result>