227-153=74, 401+74=475, 475/25=19. Merge these three step-by-step formulas into a comprehensive formula, the correct one is: how much.
227-153=74，401+74=475，475/25=19．将这三个分步式子合并为综合算式，正确的是：多少．
<gadget id="calculator">227 - 153</gadget>
<output>74</output>

<gadget id="calculator">401 + 74</gadget>
<output>475</output>

<gadget id="calculator">475 / 25</gadget>
<output>19</output>

<result>19</result>