(739+852)+(648+161)
(739+852)+(648+161)
<gadget id="calculator">739 + 852</gadget>
<output>1_591</output>

<gadget id="calculator">648 + 161</gadget>
<output>809</output>

<gadget id="calculator">1_591 + 809</gadget>
<output>2_400</output>

<result>2_400</result>