If we multiply the digits of a number until we get a single digit, then which is the only two digit number which require multiplication of digits more than 3 times?	Choose the correct choice
A) 77 B) 67 C) 87 D) 97 E) 57
77 =7*7= 
<gadget id="calculator">7*7</gadget>
<output>49</output>
49   49=4*9= 
<gadget id="calculator">4*9</gadget>
<output>36</output>
36   36=3*6= 
<gadget id="calculator">3*6</gadget>
<output>18</output>
18   18=1*8= 
<gadget id="calculator">1*8</gadget>
<output>8</output>
8   77NSWER:77
<result>A</result>
If we multiply the digits of a number until we get a single digit, then which is the only two digit number which require multiplication of digits more than 3 times?