Nanshan Cement Factory has 32 tons of cement in warehouse No. 1, and 54 tons of cement in warehouse No. 2. Warehouse No. 1 deposits 4 tons of cement every day, and Warehouse No. 2 deposits 9 tons of cement every day. After how many days, the amount of cement in No. 2 Warehouse is twice that of No. 1 Warehouse.
南山水泥厂一号仓库存有水泥32吨，二号仓库存有水泥54吨．一号仓库每天存入水泥4吨，二号仓库每天存入水泥9吨，多少天之后二号仓库的水泥吨数是一号仓库水泥的2倍．
<gadget id="calculator">2 * 32</gadget>
<output>64</output>

<gadget id="calculator">64 - 54</gadget>
<output>10</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">9 - 8</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<result>10</result>