Do you know what 22 divided by 7 is pi = 3.14 etc.
Do you know its reciprocal? Reciprocal means turning it upside down. So deuteronomy 7:22 is:
And the Lord your God wilk drive out those nations I.e. nations of sin before you little by little; you will be unable to destroy them at once, lest the beasts of the field become too numerous for you.
I apply the blood of Jesus on this post