1397 x 1397	Choose the most appropriate option:
A) 1951609
B) 1981709
C) 18362619
D) 2031719
E) None of these
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.   1951609nswer: Option 1951609
<result>A</result>
1397 x 1397