Calculate with a simple method: ((380+521*1995)/(1996*521-141))-(1/180).
用简便方法计算：((380+521*1995)/(1996*521-141))-(1/180)．
<gadget id="calculator">521 * 1_995</gadget>
<output>1_039_395</output>

<gadget id="calculator">380 + 1_039_395</gadget>
<output>1_039_775</output>

<gadget id="calculator">1_996 * 521</gadget>
<output>1_039_916</output>

<gadget id="calculator">1_039_916 - 141</gadget>
<output>1_039_775</output>

<gadget id="calculator">1_039_775 / 1_039_775</gadget>
<output>1</output>

<gadget id="calculator">1 / 180</gadget>
<output>1/180 = around 0.005556</output>

<gadget id="calculator">1 - (1/180)</gadget>
<output>179/180 = around 0.994444</output>

<result>179/180 = around 0.994444</result>