Calculation: (101+103+105+…+999)-(91+93+95+…+989)
计算：(101+103+105+…+999)-(91+93+95+…+989)
<gadget id="calculator">999 - 989</gadget>
<output>10</output>

<gadget id="calculator">10 * 450</gadget>
<output>4_500</output>

<result>4_500</result>