28+172*88-78.
28+172*88-78．
<gadget id="calculator">172 * 88</gadget>
<output>15_136</output>

<gadget id="calculator">15_136 - 78</gadget>
<output>15_058</output>

<gadget id="calculator">28 + 15_058</gadget>
<output>15_086</output>

<result>15_086</result>