Given that △+○=43, ○+□=92, △+□=63, then ○=how much.
已知△+○=43，○+□=92，△+□=63，则○=多少．
<gadget id="calculator">43 + 92 + 63</gadget>
<output>198</output>

<gadget id="calculator">198 / 2</gadget>
<output>99</output>

<gadget id="calculator">99 - 63</gadget>
<output>36</output>

<result>36</result>