A batch of school uniforms processed by the garment factory has been completed (3/10), and another 224 sets will just complete the task of all school uniforms. How many school uniforms are there in total?
服装厂加工一批校服，已经完成了(3/10)，再做224套就正好完成全部校服的任务．这批校服一共多少套？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">224 / (7/10)</gadget>
<output>320</output>

<result>320</result>