Ella has 4 bags with 20 apples in each bag and six bags with 25 apples in each bag. If Ella sells 200 apples, how many apples does Ella has left?
4 bags have 4 x 20 = 
<gadget id="calculator">4*20</gadget>
<output>80</output>
80 apples.
And, six bags have 6 x 25 = 
<gadget id="calculator">6*25</gadget>
<output>150</output>
150 apples.
Thus, Ella has 80 + 150 = 
<gadget id="calculator">80+150</gadget>
<output>230</output>
230 apples in all.
Therefore, Ella has 230 - 200 = 
<gadget id="calculator">230-200</gadget>
<output>30</output>
30 apple left.

<result>30</result>