bantu jawab dong kak please:(( aku lupa lg caranya

1.8x4x10(9+7)
=32x10(16)

2.4:8(10(7)-10(9))
=0,5x10(-2)

1).pxq= 8×10^9 × 4×10^7 =(8×4)×(10^9+7)
32×10^16
2).q/p= 4/8 × (10^7-9) = ½×10^-2
3).p+q= 800×10^7+4×10^7 = 804×10^7