CREATE TABLE table_70621 ("Team" TEXT, "Truck ( s ) " TEXT, "Driver ( s ) " TEXT, "Primary Sponsor ( s ) " TEXT, "Owner ( s ) " TEXT, "Crew Chief" TEXT, "Rounds" FLOAT)

What is the most number of rounds that the Team from RBR Enterprises and having a Chevrolet Silverado ran?
SELECT MAX("Rounds") FROM table_70621 WHERE "Truck(s)" = 'chevrolet silverado' AND "Team" = 'rbr enterprises'
SELECT MAX("Rounds") FROM "table_70621" WHERE "Team" = 'rbr enterprises' AND "Truck(s)" = 'chevrolet silverado'