1397 x 1397 = ? Pick one:
A) 1961609
B) 1851609
C) 1951619
D) 1951609
E) 1851619
1397 x 1397	= (1397)^2   = (1400 - 3)^2   = (1400)^2 + (3)^2 - (2 x 1400 x 3)   = 1960000 + 9 - 8400   = 1960009 - 8400= 
<gadget id="calculator">1960009 - 8400</gadget>
<output>1_951_609</output>
1951609.   Answer is 1951609.
<result>D</result>
1397 x 1397 = ?