find the principle on a certain sum of money at 5 % per annum for 2 2 / 5 years if the amount being rs. 1904?  Choices:
A) 1700
B) 2777
C) 2889
D) 27670
E) 2771
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">12 / 5</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(12/5) * 5</gadget>
<output>12</output>

<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">(3/25) + 1</gadget>
<output>28/25 = around 1.12</output>

<gadget id="calculator">1_904 / (28/25)</gadget>
<output>1_700</output>

<result>A</result>
find the principle on a certain sum of money at 5 % per annum for 2 2 / 5 years if the amount being rs. 1904?
divide(1904, add(divide(multiply(divide(add(multiply(2, 5), 2), 5), 5), const_100), const_1))
"1904 = p [ 1 + ( 5 * 12 / 5 ) / 100 ] p = 1700 . answer : a"