A garment factory used to make a set of uniforms with 4.2 meters of cloth. After changing the cutting method, each set saves 0.2 meters of cloth. Originally made 1,800 sets of uniforms, how many sets can be made now?
一个服装厂原来做一套制服用4.2米布．改变裁剪方法后，每套节省布0.2米．原来做1800套制服的布，现在可以做多少套？
<gadget id="calculator">4.2 * 1_800</gadget>
<output>7_560</output>

<gadget id="calculator">4.2 - 0.2</gadget>
<output>4</output>

<gadget id="calculator">7_560 / 4</gadget>
<output>1_890</output>

<result>1_890</result>