Write out the calculation algorithm of 1 + 4 + 7 + 10 + 13 + 16 + 19 + 22 + 25 + 28 + 31 + 34 + 34 and draw the corresponding program block diagram I know that too. Can you be more detailed?

Write out the calculation algorithm of 1 + 4 + 7 + 10 + 13 + 16 + 19 + 22 + 25 + 28 + 31 + 34 + 34 and draw the corresponding program block diagram I know that too. Can you be more detailed?

int count=0;
for(int i=0;i

1 + 4 + 7 + 10 + 13 + 16 + 19 + 22 + 25 + 28 + 31 + 34 + 37 + 40 + 43 + 46 + 49 is calculated by the formula

1+4+7+10+13+16+19+22+25+28+31+34+37+40+43+46+49
=(1+49)+(4+46)+(7+43)+(10+40)+(13+37)+(16+34)+(19+31)+(22+28)+25
=50*8+25
=400+25
=425

Mathematics of grade 4 in primary school (simple operation) (98 × 128) △ 49, please use a simple method to calculate it. Thank you

（98×128）÷49
=98÷48×128
=2×128
=256