What is the result of subtracting the difference of 6 from 6 times 3.5 and dividing by 0.25? (column comprehensive formula)
3.5的6倍减去6的差，再除以0.25，结果是多少？(列综合算式)
<gadget id="calculator">3.5 * 6</gadget>
<output>21</output>

<gadget id="calculator">21 - 6</gadget>
<output>15</output>

<gadget id="calculator">15 / 0.25</gadget>
<output>60</output>

<result>60</result>