The two warehouses of A and B have a total of 84 tons of cement. If 16 tons of cement are transported from warehouse A to warehouse B, then the quantity ratio of cement in warehouse A and warehouse B is 4:3. How many tons of cement did Warehouse A originally have?
甲乙两个仓库共有水泥84吨．如果从甲仓库运出16吨水泥放入乙仓库，那么甲仓库和乙仓库的水泥数量比是4：3．甲仓库原来有水泥多少吨？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">84 * (4/7)</gadget>
<output>48</output>

<gadget id="calculator">48 + 16</gadget>
<output>64</output>

<result>64</result>