or

777=37*2 1 love 3, be good, 7, calculate 2, learn 1

Because the XXX type is a multiple of 1 1 1

1 1 1=37*3

Multiplied by 2 equals 9.

222=37*6

……

555=37* 15

……

777=37*2 1

……

999=37*27

Only the formula of 555,777 fits.