If 532=1561028, 641=244630, 785=564035123 then 821=?

Question

LCM of two numbers is 60 times their HCF. If sum of LCM and HCF is 549. If one number is 45 then what is the other number?

Answer 1

Ans is 162824.
Here the logic is..
532=(5*3)(3*2)(2*5)(5*3+3*2+2*5-middle digit of 532 i.e., 3)
So 532=1561028

Same logic is applicable for all
So 821=1628(16+2+8-2(middle digit of 821))
Now the ans is 162824