hasil dari √21×3√6×√15/2√7×√3×√10 =

1000.................

(√21 x 3√6 x √15)/(2√7 x √3 x √10)
= (3√(21x6x15))/(2√(7x3x10))
= (3√(3x7x3x2x3x5)/(2√(7x3x2x5))
= (3x3√(2x3x5x7))/(2√(2x3x5x7))
= (9√210)/(2√210)
= 9/2
= 4½