Calculation: 29+42+87+55+94+31+68+76+13=how much.
计算：29+42+87+55+94+31+68+76+13=多少．
<gadget id="calculator">29 + 42 + 87 + 55 + 94 + 31 + 68 + 76 + 13</gadget>
<output>495</output>

<result>495</result>