1.
var a, b, s: real;
begin
readln(a, b);
s:=s*b;
writeln(s);
end.
2.
var a, b, c, d, s: real;
begin
readln(a, b, c, d);
s:=a+b+c+d;
writeln(s);
end.
3.
var a, b, c, mult: real;
begin
readlb(a, b, c);
mult:=a*b*c;
writeln(mult);
end.
4.
var a, h, s: real;
begin
readlb(a, h);
s:=a*h;
writeln(s);
end.
5.
var a, b, o: real;
begin
readln(a, b);
o:=a/b;
writeln(o);
end.
6.
const pi=3.14;
var r, l: real;
begin
readln(r);
l:=2*pi*r;
writeln(l);
end.
7.
const pi=3.14;
var r, s: real;
begin
readln(r);
s:=pi*sqr(r);
writeln(s);
end.
8.
var a, s: real;
begin
readln(a);
s:=sqr(a);
writeln(s);
end.
9.
var a, h, s: real;
begin
readln(a, h);
s:=a*h;
writeln(s);
end.
10. хз что это.