The typist Xiao Zhang has to type a 360-page manuscript. He originally planned to type 60 pages a day, but actually typed 90 pages a day. In this way, Xiao Zhang can finish the manuscript a few days earlier than the original plan?
打字员小张要打360页稿子，原计划每天打60页，实际每天打90页，这样小张可以比原计划提前几天打完这份稿子？
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>