There is a batch of coal in the cafeteria of Dongguan Primary School. After using up (3/5) of the total, another 1450 kg was bought, which is now equivalent to the original (9/8). How many kg of coal is there now?
东关小学食堂有一批煤，用去总数的(3/5)后，又买来1450千克，现在相当于原来的(9/8)，求现在的存煤多少千克？
<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(9/8) - (2/5)</gadget>
<output>29/40 = around 0.725</output>

<gadget id="calculator">1_450 / (29/40)</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 * (2/5)</gadget>
<output>800</output>

<gadget id="calculator">800 + 1_450</gadget>
<output>2_250</output>

<result>2_250</result>