6985*7138-1985/(1/1593)-2564/(1/6985)-2981/(1/1985).
6985*7138-1985/(1/1593)-2564/(1/6985)-2981/(1/1985)．
<gadget id="calculator">6_985 * 7_138</gadget>
<output>49_858_930</output>

<gadget id="calculator">1 / 1_593</gadget>
<output>1/1_593 = around 0.000628</output>

<gadget id="calculator">1_985 / (1/1_593)</gadget>
<output>3_162_105</output>

<gadget id="calculator">1 / 6_985</gadget>
<output>1/6_985 = around 0.000143</output>

<gadget id="calculator">2_564 / (1/6_985)</gadget>
<output>17_909_540</output>

<gadget id="calculator">1 / 1_985</gadget>
<output>1/1_985 = around 0.000504</output>

<gadget id="calculator">2_981 / (1/1_985)</gadget>
<output>5_917_285</output>

<gadget id="calculator">49_858_930 - 3_162_105 - 17_909_540 - 5_917_285</gadget>
<output>22_870_000</output>

<result>22_870_000</result>