"2170除以三十"...2170除以三十
"217除以31"...217除以31
"217除以230"...217除以230
"317除以二十"...317除以二十
"213除以七十"...213除以七十
"2170除以31等于几"...2170除以31等于几
"217除以3等于几"...217除以3等于几
"217除以七十"...217除以七十
"217除以29"...217除以29
"217除3"...217除3
