What is the sum of 50 minus the difference between 4.55 and 2.7, plus 2.85?
50减去4.55与2.7的差，再加上2.85，和是多少？
<gadget id="calculator">4.55 - 2.7</gadget>
<output>1.85</output>

<gadget id="calculator">50 - 1.85</gadget>
<output>48.15</output>

<gadget id="calculator">48.15 + 2.85</gadget>
<output>51</output>

<result>51</result>