When I was immersed in wiping the floor, I was able to have zero thoughts in my mind.
I concentrated completely on wiping down the floor, and as a result, I was able to empty my mind.
ご質問ありがとうございます。
① "When I was immersed in wiping the floor,"＝「雑巾がけに没頭していたら」
"I was able to have zero thoughts in my mind."＝「心には何も考えがないように出来た。」
② "I concentrated completely on wiping down the floor,"＝「私は完全に床拭きに集中した」
"and as a result, I was able to empty my mind."＝「その結果、私は心を無にすることが出来た。」
ご参考に。
アメリカ合衆国 
