Both the large and small pools are not filled with water. If water is drawn from the small pool to fill the large pool, there will be 10 tons of water left in the small pool; 1.2 times the volume of the small pool, how many tons of water are there in the two pools?
大、小两水池都未注满水，如果从小池抽水将大池灌满，则小池还剩水10吨；如果从大池抽水将小池灌满，则大池还剩水20吨，已知大池容积是小池容积的1.2倍，两池中共有水多少吨？
<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">1.2 - 1</gadget>
<output>0.2</output>

<gadget id="calculator">10 / 0.2</gadget>
<output>50</output>

<gadget id="calculator">50 + 20</gadget>
<output>70</output>

<result>70</result>